- 专利标题: MULTILAYER PIEZOELECTRIC ELEMENT, PIEZOELECTRIC VIBRATION APPARATUS, AND ELECTRONIC DEVICE
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申请号: US16039159申请日: 2018-07-18
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公开(公告)号: US20190027677A1公开(公告)日: 2019-01-24
- 发明人: Sumiaki KISHIMOTO , Hiroyuki SHIMIZU , Tomohiro HARADA , Yukihiro KONISHI
- 申请人: TAIYO YUDEN CO., LTD.
- 优先权: JP2017-141140 20170720; JP2018-045558 20180313
- 主分类号: H01L41/083
- IPC分类号: H01L41/083 ; H01L41/27 ; H01L41/047 ; H01L41/293 ; H01L41/09 ; H01L41/187
摘要:
A multilayer piezoelectric element includes a ceramic base body, a pair of external electrodes, multiple internal electrodes, and surface electrodes. The ceramic base body is formed by a piezoelectric ceramic. The pair of external electrodes cover a pair of end faces. The multiple internal electrodes are stacked inside the ceramic base body along a thickness direction crossing at right angles with a longitudinal direction, and connected alternately to the pair of external electrodes in the thickness direction. The surface electrodes are provided on a pair of principal faces, respectively, and are each connected to the external electrode different from the one to which the internal electrode adjacent in the thickness direction is connected. The pair of external electrodes have a higher porosity than the surface electrodes.
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